I have never seen Dweezil, but he is doing the world a favor IMHO.
Only saw Frank once in 76.
The entire band was amazing.
I’m not a huge Zappa fan (I’m not sure you can be a casual Zappa fan so I guess that means I’m not a fan).
However, Dweezil is an insanely talented guitarist. He’s probably the only person who can actually perform Frank’s music in any meaningful way.